Metal Whiskers: Failure Modes & Mitigation Strategies - NEPP - NASA
Metal Whiskers: Failure Modes & Mitigation Strategies - NEPP - NASA
Metal Whiskers: Failure Modes & Mitigation Strategies - NEPP - NASA
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• Specimen:<br />
<strong>NASA</strong> Goddard Whisker <strong>Mitigation</strong> Study<br />
Conformal Coat (Uralane 5750* Polyurethane)<br />
~9 Years of Office Ambient Storage<br />
– 1” x 4”x 1/16” Brass 260<br />
– Tin-Plated 200 microinches<br />
– Intentional scratches created<br />
after plating<br />
• Conformal Coating:<br />
– Uralane 5750 on ½ of sample<br />
– Nominal Thickness = 2 mils<br />
• Storage Conditions:<br />
– Office Ambient ~ 9 years<br />
* Uralane TM 5750 now known as Aralane TM 5750<br />
NO<br />
Conformal<br />
Coat<br />
December 5, 2007 <strong>Metal</strong> <strong>Whiskers</strong>:<br />
<strong>Failure</strong> <strong>Modes</strong> and <strong>Mitigation</strong> <strong>Strategies</strong><br />
Uralane<br />
Coated<br />
18
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